iirc, that was on the spindle axis - i only was gently pushing the drive arm near its supporting point to avoid it touching the platters (chances are i did make it touch the platters)...

Mind you, this was not in a clean room and i tried to be as quick as possible to not allow too much dust into the case..

Here's an online article, might even be the same drive (this was a external WD drive, not sure about the capacity, i think 500GB or 1TB): https://dataanalyzers.com/external-hard-drive-western-digita...